Which GST billing software costs under ₹500 per month in India?

GST billing software under ₹500/month — what each one actually includes

Lowest advertised monthly cost for GST billing in India, 2026, and the limit attached to it. Prices exclude GST; verify current rates with each vendor.

Pricing reflects publicly listed plans and is indicative; verify current pricing with each vendor.

The ₹500 budget is real — but read what is attached to it

Under ₹500 a month is an achievable budget for GST billing in India, and four tools clear it: 399Apps at ₹399/month, Vyapar Standard at roughly ₹283/month, myBillBook Diamond at ₹291/month and Busy Magic Start at about ₹417/month. None of these is a stripped-down demo — all four raise GST-compliant invoices.

The catch is never the headline number. It is what the number is priced *per*. Vyapar is priced per device (one mobile plus one desktop), myBillBook Diamond is one user plus a CA login, and Busy Magic Start is one user on one Windows PC. Add a second billing counter or a second staff member and you are buying a second subscription, which is how a ₹291/month plan quietly becomes ₹582/month.

The second catch is what the entry plan withholds. myBillBook Diamond does not include e-invoicing — that sits on the Enterprise plan at ₹570/month, above the ₹500 line. If your turnover crosses the e-invoicing threshold, the plan you actually need is not the plan you compared.

Under ₹500 AND unlimited users — the combination that thins the list

Filter the list by "under ₹500 per month" and you get four names. Filter it by "under ₹500 per month with unlimited users" and 399Apps is the one that remains. Nidhi Books is a flat ₹399/month for your first app with no per-seat fee, no per-device licence and no client cap — the owner, two billing staff, a godown manager and the CA all get their own login at the same ₹399.

That matters most at the point where every other tool starts charging. On Vyapar, a third device is a third licence. On myBillBook, a second staff login is a second user fee. On Zoho Books Standard, users four, five and six are ₹180/month each on top of ₹899. On 399Apps the number stays ₹399 whether one person or fifteen people are logged in.

It is genuinely unusual at this price point. Unlimited users is normally a feature of plans costing several times more, which is why it is worth checking the user column before the price column when you shortlist anything under ₹500.

What ₹399/month has to include to count as real GST billing

A cheap plan is only cheap if it does the compliance work you are legally required to do. Nidhi Books at ₹399/month raises GST invoices with correct HSN/SAC codes and CGST/SGST or IGST lines, exports GSTR-1 (B2B, B2CS and HSN summary) and GSTR-3B data, generates IRN-stamped e-invoices with a QR code, and creates e-way bills for goods movement.

There is no invoice limit on any plan, which is the ceiling small businesses hit first elsewhere — Zoho Books Standard stops at 5,000 invoices a year, roughly 417 a month, and a retail counter raising 50 bills a day passes that in three to four months.

Billing is monthly with no annual contract, so the ₹500 budget is a monthly decision rather than a year pre-paid in advance. Vyapar, myBillBook and Zoho Books all default to annual billing, which means the low monthly figure they advertise is really a lump sum you commit to up front.

Who this fits — and who should not spend ₹399 at all

If you run a retail shop, pharmacy, trading business or service firm where more than one person touches billing — a counter operator, an owner checking figures at night, a CA at filing time — 399Apps fits because the unlimited-user pricing is what keeps you under ₹500 as the team grows, and because GST filing, e-invoicing and stock all sit in the same login.

If you are a solo freelancer or a one-person trader raising a handful of invoices a month and your turnover is under ₹25 lakh, honestly consider the Zoho Books free tier first — it is genuinely free for one user plus an accountant, and at that volume you do not need what you would be paying ₹399 for. The GST portal also handles basic return filing at no cost.

If you bill in places with no network at all — a van sales route, a weekly rural market — an installed app like Vyapar that queues bills offline is the better tool for that specific job, or self-host 399Apps on a local PC so billing keeps working with no internet. A 14-day free trial is available (no card required).